11 (number)
Encyclopedia
11 is the natural number
following 10
and preceding 12
.
Eleven is the first number which cannot be counted
with a human
's eight finger
s and two thumb
s additively. In English, it is the smallest positive integer requiring three syllables and the largest prime number with a single-morpheme name. Its etymology originates from a Germanic compound ainlif meaning "one left".). It is also the second number in the "teens."
. It is the smallest two-digit prime number in the decimal
base
; as well as, of course, in undecimal
(where it is the smallest two-digit number). It is also the smallest three-digit prime in ternary
, and the smallest four-digit prime in binary
, but a single-digit prime in bases larger than eleven, such as duodecimal
, hexadecimal
, vigesimal
and sexagesimal. 11 is the fourth Sophie Germain prime
, the third safe prime
, the fourth Lucas prime, the first repunit prime, and the second good prime. Although it is necessary for n to be prime for 2n − 1 to be a Mersenne prime
, the converse
is not true: 211 − 1 = 2047 which is 23 × 89. The next prime is 13
, with which it comprises a twin prime
. 11 is an Eisenstein prime
with no imaginary part and real part of the form 3n − 1. Displayed on a calculator, 11 is a strobogrammatic prime
and a dihedral prime
because it reads the same whether the calculator is turned upside down or reflected on a mirror, or both.
If a number is divisible by 11, reversing its digits will result in another multiple of 11. As long as no two adjacent digits of a number added together exceed 9, then multiplying the number by 11, reversing the digits of the product, and dividing that new number by 11, will yield a number that is the reverse of the original number. (For example: 142,312 x 11 = 1,565,432. 2,345,651 / 11 = 213,241.)
Because it has a reciprocal of unique period length among primes, 11 is the second unique prime
. 11 goes into 99 exactly 9 times, so vulgar fractions with 11 in the denominator have two digit
repeating sequences in their decimal
expansions. Multiples of eleven by one-digit numbers all have matching double digits: 00 (=0), 11, 22, 33, 44, etc. Bob Dorough, in his Schoolhouse Rock song "The Good Eleven", called them "Double-digit doogies" (soft g).
Eleven is the Aliquot sum of one number, the discrete semiprime
21
and is the base of the 11-aliquot tree.
As 11 is the smallest factor of the first eleven terms of the Euclid–Mullin sequence, it is the twelfth term.
An eleven-sided polygon
is called a hendecagon or undecagon
.
In both base 6 and base 8, the smallest prime with a composite sum of digits is 11.
Any number b+1 is written as "11b" in base b, so 11 is trivially a palindrome
in base 10. However 11 is a strictly non-palindromic number
.
In base 10, there is a simple test to determine if an integer is divisible by 11: take every digit of the number located in odd position and add them up, then take the remaining digits and add them up. If the difference between the two sums is a multiple of 11, including 0, then the number is divisible by 11. For instance, if the number is 65,637 then (6 + 6 + 7) - (5 + 3) = 19 - 8 = 11, so 65,637 is divisible by eleven. This technique also works with groups of digits rather than individual digits, so long as the number of digits in each group is odd, although not all groups have to have the same number of digits. For instance, if one uses three digits in each group, one gets from 65,637 the calculation (065) - 637 = -572, which is divisible by eleven.
Another test for divisibility is to separate a number into groups of two consecutive digits (adding a leading zero if there is an odd number of digits), and then add up the numbers so formed; if the result is divisible by eleven, the number is divisible by eleven. For instance, if the number is 65,637, 06 + 56 + 37 = 99, which is divisible by eleven, so 65,637 is divisible by eleven. This also works by adding a trailing zero instead of a leading one: 65 + 63 + 70 = 198, which is divisible by eleven. This also works with larger groups of digits, providing that each group has an even number of digits (not all groups have to have the same number of digits).
An easy way of multiply
ing numbers by 11 in base 10 is:
If the number has:
In base 10, 11 is the smallest integer that is not a Nivenmorphic number.
In base thirteen and higher bases (such as hexadecimal
), eleven is represented as B, where ten is A. In duodecimal
, however, eleven is sometimes represented as E and ten as T.
Eleven is a Størmer number
, a Heegner number
, and a Mills prime.
There are 11 orthogonal curvilinear coordinate systems (to within a conformal symmetry) in which the 3-variable Helmholtz equation
can be solved using the separation of variables
technique.
See also 11-cell
.
Eleven of the thirty-five hexominoes can be folded to form cubes. Eleven of the sixty-six octiamonds can be folded to form octahedra.
The partition
numbers contain much more multiples of eleven than the one-eleventh one would expect.
According to David A. Klarner, a leading researcher and contributor to the study of polyominoes, it is possible to cut a rectangle into an odd number of congruent, non-rectangular polyominoes. Eleven is the smallest such number, the only such number that is prime, and the only such number that is not a multiple of three.
11 raised to the n power is the nth row of Pascal's Triangle. (This works for any base)
was disgraced, the remaining apostles of Jesus
were sometimes described as "the Eleven"; this occurred even after Matthias
was added to bring the number to twelve, as in Acts 2:14.
Eleven is a spiritually significant number in Thelema
.
Natural number
In mathematics, the natural numbers are the ordinary whole numbers used for counting and ordering . These purposes are related to the linguistic notions of cardinal and ordinal numbers, respectively...
following 10
10 (number)
10 is an even natural number following 9 and preceding 11.-In mathematics:Ten is a composite number, its proper divisors being , and...
and preceding 12
12 (number)
12 is the natural number following 11 and preceding 13.The word "twelve" is the largest number with a single-morpheme name in English. Etymology suggests that "twelve" arises from the Germanic compound twalif "two-leftover", so a literal translation would yield "two remaining [after having ten...
.
Eleven is the first number which cannot be counted
Counting
Counting is the action of finding the number of elements of a finite set of objects. The traditional way of counting consists of continually increasing a counter by a unit for every element of the set, in some order, while marking those elements to avoid visiting the same element more than once,...
with a human
Human
Humans are the only living species in the Homo genus...
's eight finger
Finger
A finger is a limb of the human body and a type of digit, an organ of manipulation and sensation found in the hands of humans and other primates....
s and two thumb
Thumb
The thumb is the first digit of the hand. When a person is standing in the medical anatomical position , the thumb is the lateral-most digit...
s additively. In English, it is the smallest positive integer requiring three syllables and the largest prime number with a single-morpheme name. Its etymology originates from a Germanic compound ainlif meaning "one left".). It is also the second number in the "teens."
In mathematics
Eleven is the 5th smallest prime numberPrime number
A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself. A natural number greater than 1 that is not a prime number is called a composite number. For example 5 is prime, as only 1 and 5 divide it, whereas 6 is composite, since it has the divisors 2...
. It is the smallest two-digit prime number in the decimal
Decimal
The decimal numeral system has ten as its base. It is the numerical base most widely used by modern civilizations....
base
Radix
In mathematical numeral systems, the base or radix for the simplest case is the number of unique digits, including zero, that a positional numeral system uses to represent numbers. For example, for the decimal system the radix is ten, because it uses the ten digits from 0 through 9.In any numeral...
; as well as, of course, in undecimal
Undecimal
The undecimal positional notation system is based on the number eleven, rather than ten as in decimal or eight in octal and so on. It is not a commonly used system. Undecimal requires eleven symbols representing the decimal numbers 0 through 10...
(where it is the smallest two-digit number). It is also the smallest three-digit prime in ternary
Ternary numeral system
Ternary is the base- numeral system. Analogous to a bit, a ternary digit is a trit . One trit contains \log_2 3 bits of information...
, and the smallest four-digit prime in binary
Binary numeral system
The binary numeral system, or base-2 number system, represents numeric values using two symbols, 0 and 1. More specifically, the usual base-2 system is a positional notation with a radix of 2...
, but a single-digit prime in bases larger than eleven, such as duodecimal
Duodecimal
The duodecimal system is a positional notation numeral system using twelve as its base. In this system, the number ten may be written as 'A', 'T' or 'X', and the number eleven as 'B' or 'E'...
, hexadecimal
Hexadecimal
In mathematics and computer science, hexadecimal is a positional numeral system with a radix, or base, of 16. It uses sixteen distinct symbols, most often the symbols 0–9 to represent values zero to nine, and A, B, C, D, E, F to represent values ten to fifteen...
, vigesimal
Vigesimal
The vigesimal or base 20 numeral system is based on twenty .- Places :...
and sexagesimal. 11 is the fourth Sophie Germain prime
Sophie Germain prime
In number theory, a prime number p is a Sophie Germain prime if 2p + 1 is also prime. For example, 23 is a Sophie Germain prime because it is a prime and 2 × 23 + 1 = 47, and 47 is also a prime number...
, the third safe prime
Safe prime
A safe prime is a prime number of the form 2p + 1, where p is also a prime. The first few safe primes are...
, the fourth Lucas prime, the first repunit prime, and the second good prime. Although it is necessary for n to be prime for 2n − 1 to be a Mersenne prime
Mersenne prime
In mathematics, a Mersenne number, named after Marin Mersenne , is a positive integer that is one less than a power of two: M_p=2^p-1.\,...
, the converse
Converse (logic)
In logic, the converse of a categorical or implicational statement is the result of reversing its two parts. For the implication P → Q, the converse is Q → P. For the categorical proposition All S is P, the converse is All P is S. In neither case does the converse necessarily follow from...
is not true: 211 − 1 = 2047 which is 23 × 89. The next prime is 13
13 (number)
13 is the natural number after 12 and before 14. It is the smallest number with eight letters in its name spelled out in English. It is also the first of the teens – the numbers 13 through 19 – the ages of teenagers....
, with which it comprises a twin prime
Twin prime
A twin prime is a prime number that differs from another prime number by two. Except for the pair , this is the smallest possible difference between two primes. Some examples of twin prime pairs are , , , , and...
. 11 is an Eisenstein prime
Eisenstein prime
In mathematics, an Eisenstein prime is an Eisenstein integerz = a + b\,\omega\qquadthat is irreducible in the ring-theoretic sense: its only Eisenstein divisors are the units , a + bω itself and its associates.The associates and the complex conjugate...
with no imaginary part and real part of the form 3n − 1. Displayed on a calculator, 11 is a strobogrammatic prime
Strobogrammatic prime
A strobogrammatic prime is a prime number that, given a base and given a set of glyphs, appears the same whether viewed normally or upside down. In base 10, given a set of glyphs where 0, 1 and 8 are symmetrical around the horizontal axis, and 6 and 9 are the same as each other upside down, A...
and a dihedral prime
Dihedral prime
A dihedral prime or dihedral calculator prime is a prime number that still reads like itself or another prime number when read in a seven-segment display, regardless of orientation , and surface...
because it reads the same whether the calculator is turned upside down or reflected on a mirror, or both.
If a number is divisible by 11, reversing its digits will result in another multiple of 11. As long as no two adjacent digits of a number added together exceed 9, then multiplying the number by 11, reversing the digits of the product, and dividing that new number by 11, will yield a number that is the reverse of the original number. (For example: 142,312 x 11 = 1,565,432. 2,345,651 / 11 = 213,241.)
Because it has a reciprocal of unique period length among primes, 11 is the second unique prime
Unique prime
In number theory, a unique prime is a certain kind of prime number. A prime p ≠ 2, 5 is called unique if there is no other prime q such that the period length of the decimal expansion of its reciprocal, 1 / p, is equivalent to the period length of the reciprocal of q, 1 / q...
. 11 goes into 99 exactly 9 times, so vulgar fractions with 11 in the denominator have two digit
Numerical digit
A digit is a symbol used in combinations to represent numbers in positional numeral systems. The name "digit" comes from the fact that the 10 digits of the hands correspond to the 10 symbols of the common base 10 number system, i.e...
repeating sequences in their decimal
Decimal
The decimal numeral system has ten as its base. It is the numerical base most widely used by modern civilizations....
expansions. Multiples of eleven by one-digit numbers all have matching double digits: 00 (=0), 11, 22, 33, 44, etc. Bob Dorough, in his Schoolhouse Rock song "The Good Eleven", called them "Double-digit doogies" (soft g).
Eleven is the Aliquot sum of one number, the discrete semiprime
Semiprime
In mathematics, a semiprime is a natural number that is the product of two prime numbers. The first few semiprimes are 4, 6, 9, 10, 14, 15, 21, 22, 25, 26, ... ....
21
21 (number)
21 is the natural number following 20 and preceding 22.-In mathematics:Twenty-one is the fifth discrete Semiprime and the second in the family. With 22 it forms the second discrete Semiprime pair...
and is the base of the 11-aliquot tree.
As 11 is the smallest factor of the first eleven terms of the Euclid–Mullin sequence, it is the twelfth term.
An eleven-sided polygon
Polygon
In geometry a polygon is a flat shape consisting of straight lines that are joined to form a closed chain orcircuit.A polygon is traditionally a plane figure that is bounded by a closed path, composed of a finite sequence of straight line segments...
is called a hendecagon or undecagon
Hendecagon
In geometry, a hendecagon is an 11-sided polygon....
.
In both base 6 and base 8, the smallest prime with a composite sum of digits is 11.
Any number b+1 is written as "11b" in base b, so 11 is trivially a palindrome
Palindromic number
A palindromic number or numeral palindrome is a 'symmetrical' number like 16461, that remains the same when its digits are reversed. The term palindromic is derived from palindrome, which refers to a word like rotor that remains unchanged under reversal of its letters...
in base 10. However 11 is a strictly non-palindromic number
Strictly non-palindromic number
A strictly non-palindromic number is an integer n that is not palindromic in any numeral system with a base b in the range 2 ≤ b ≤ n − 2...
.
In base 10, there is a simple test to determine if an integer is divisible by 11: take every digit of the number located in odd position and add them up, then take the remaining digits and add them up. If the difference between the two sums is a multiple of 11, including 0, then the number is divisible by 11. For instance, if the number is 65,637 then (6 + 6 + 7) - (5 + 3) = 19 - 8 = 11, so 65,637 is divisible by eleven. This technique also works with groups of digits rather than individual digits, so long as the number of digits in each group is odd, although not all groups have to have the same number of digits. For instance, if one uses three digits in each group, one gets from 65,637 the calculation (065) - 637 = -572, which is divisible by eleven.
Another test for divisibility is to separate a number into groups of two consecutive digits (adding a leading zero if there is an odd number of digits), and then add up the numbers so formed; if the result is divisible by eleven, the number is divisible by eleven. For instance, if the number is 65,637, 06 + 56 + 37 = 99, which is divisible by eleven, so 65,637 is divisible by eleven. This also works by adding a trailing zero instead of a leading one: 65 + 63 + 70 = 198, which is divisible by eleven. This also works with larger groups of digits, providing that each group has an even number of digits (not all groups have to have the same number of digits).
An easy way of multiply
Multiply
Multiply is a social networking service with an emphasis on allowing users to share media – such as photos, videos and blog entries – with their "real-world" network...
ing numbers by 11 in base 10 is:
If the number has:
- 1 digit - Replicate the digit (so 2 x 11 becomes 22).
- 2 digits - Add the 2 digits together and place the result in the middle (so 47 x 11 becomes 4 (11) 7 or 4 (10+1) 7 or (4+1) 1 7 or 517).
- 3 digits - Keep the first digit in its place for the result's first digit, add the first and second digits together to form the result's second digit, add the second and third digits together to form the result's third digit, and keep the third digit as the result's fourth digit. For any resulting numbers greater than 9, carry the 1 to the left. Example 1: 123 x 11 becomes 1 (1+2) (2+3) 3 or 1353. Example 2: 481 x 11 becomes 4 (4+8) (8+1) 1 or 4 (10+2) 9 1 or (4+1) 2 9 1 or 5291.
- 4 or more digits - Follow the same pattern as for 3 digits.
In base 10, 11 is the smallest integer that is not a Nivenmorphic number.
In base thirteen and higher bases (such as hexadecimal
Hexadecimal
In mathematics and computer science, hexadecimal is a positional numeral system with a radix, or base, of 16. It uses sixteen distinct symbols, most often the symbols 0–9 to represent values zero to nine, and A, B, C, D, E, F to represent values ten to fifteen...
), eleven is represented as B, where ten is A. In duodecimal
Duodecimal
The duodecimal system is a positional notation numeral system using twelve as its base. In this system, the number ten may be written as 'A', 'T' or 'X', and the number eleven as 'B' or 'E'...
, however, eleven is sometimes represented as E and ten as T.
Eleven is a Størmer number
Størmer number
In mathematics, a Størmer number or arc-cotangent irreducible number, named after Carl Størmer, is a positive integer n for which the greatest prime factor of n2 + 1 meets or exceeds 2n. The first few Størmer numbers are 1, 2, 4, 5, 6, 9, 10, 11, 12, 14, 15, 16, 19, 20, etc....
, a Heegner number
Heegner number
In number theory, a Heegner number is a square-free positive integer d such that the imaginary quadratic field Q has class number 1...
, and a Mills prime.
There are 11 orthogonal curvilinear coordinate systems (to within a conformal symmetry) in which the 3-variable Helmholtz equation
Helmholtz equation
The Helmholtz equation, named for Hermann von Helmholtz, is the elliptic partial differential equation\nabla^2 A + k^2 A = 0where ∇2 is the Laplacian, k is the wavenumber, and A is the amplitude.-Motivation and uses:...
can be solved using the separation of variables
Separation of variables
In mathematics, separation of variables is any of several methods for solving ordinary and partial differential equations, in which algebra allows one to rewrite an equation so that each of two variables occurs on a different side of the equation....
technique.
See also 11-cell
11-cell
In mathematics, the 11-cell is a self-dual abstract regular 4-polytope . Its 11 cells are hemi-icosahedral. It has 11 vertices, 55 edges and 55 faces. Its symmetry group is the projective special linear group L2, so it has660 symmetries...
.
Eleven of the thirty-five hexominoes can be folded to form cubes. Eleven of the sixty-six octiamonds can be folded to form octahedra.
The partition
Partition (number theory)
In number theory and combinatorics, a partition of a positive integer n, also called an integer partition, is a way of writing n as a sum of positive integers. Two sums that differ only in the order of their summands are considered to be the same partition; if order matters then the sum becomes a...
numbers contain much more multiples of eleven than the one-eleventh one would expect.
According to David A. Klarner, a leading researcher and contributor to the study of polyominoes, it is possible to cut a rectangle into an odd number of congruent, non-rectangular polyominoes. Eleven is the smallest such number, the only such number that is prime, and the only such number that is not a multiple of three.
11 raised to the n power is the nth row of Pascal's Triangle. (This works for any base)
List of basic calculations
| Multiplication Multiplication Multiplication is the mathematical operation of scaling one number by another. It is one of the four basic operations in elementary arithmetic .... |
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11 | 22 22 (number) 22 is the natural number following 21 and preceding 23.- In mathematics :Twenty-two is an even composite number, its proper divisors being 1, 2 and 11.... |
33 33 (number) 33 is the natural number following 32 and preceding 34.-In mathematics:33 is the largest positive integer that cannot be expressed as a sum of different triangular numbers. It is also the smallest odd repdigit that is not a prime number.33 is the eighth distinct semiprime comprising the prime... |
44 44 (number) 44 is the natural number following 43 and preceding 45.- In mathematics :Forty-four is a tribonacci number, a happy number, an octahedral number and a palindromic number.... |
55 55 (number) 55 is the natural number following 54 and preceding 56.-Albania:*Gazeta 55, a newspaper*Constitution law 55, a law during Communist Albania.-Mathematics:... |
66 66 (number) 66 is the natural number following 65 and preceding 67.Usages of this number include:-Mathematics:*66 is a sphenic number, a triangular number, a hexagonal number, and a semi-meandric number... |
77 77 (number) 77 is the natural number following 76 and preceding 78. Seventy-seven is the smallest positive integer requiring five syllables in English.-In mathematics:... |
88 88 (number) 88 is the natural number following 87 and preceding 89.- In mathematics :Eighty-Eight is a refactorable number, a primitive semiperfect number and an untouchable number... |
99 99 (number) 99 is the natural number following 98 and preceding 100.-Mathematics:99 is the ninth repdigit, a palindromic number and a Kaprekar number... |
110 110 (number) 110 is the natural number following 109 and preceding 111.It is also known as "eleventy", a term made famous by linguist and author J. R. R... |
121 121 (number) 121 is the natural number following 120 and preceding 122.-In mathematics:One hundred [and] twenty-one is a square and is the sum of three consecutive primes . There are no squares besides 121 known to be of the form 1 + p + p^2 + p^3 + p^4, where p is prime... |
132 132 (number) 132 is the natural number following 131 and preceding 133.-In mathematics:132 is the sixth Catalan number. It is a pronic number, the product of 11 and 12. As it has 12 divisors total, 132 is a refactorable number.... |
143 143 (number) 143 is the natural number following 142 and preceding 144.-In mathematics:143 is the sum of three consecutive primes , as well as the sum of seven consecutive primes... |
154 154 (number) One hundred and fifty-four is the natural number following one hundred and fifty-three and preceding one hundred and fifty-five.-In mathematics:* 154 is a nonagonal number... |
165 165 (number) 165 is the natural number following 164 and preceding 166.-In mathematics:* 165 is an odd number* 165 is a composite number* 165 is a deficient number* 165 is a binary palindromic number * 165 is a sphenic number... |
176 176 (number) 176 is the natural number following 175 and preceding 177.-In mathematics:* 176 is an even number* 176 is an abundant number, as 196 is greater than 176* 176 is a cake number* 176 is a composite number... |
187 187 (number) 187 is the natural number following 186 and preceding 188.-In mathematics:* 187 is an odd number* 187 is a composite number* 187 is a deficient number, as 29 is less than 187* 187 is a self number* 187 is a square-free number... |
198 198 (number) 198 is the natural number following 197 and preceding 199.-In mathematics:* 198 is an even number* 198 is an abundant number, as 270 is greater than 198* 198 is a composite number* 198 is a Harshad number, divisible by the sum of its digits... |
209 209 (number) 209 is the natural number following 208 and preceding 210. It is written as "two hundred and nine".-In mathematics:* 209 is a highly cototient number* 209 is a Harshad number* 209 is a self number* 209=16+25+34+43+52+61-In other fields:... |
220 220 (number) 220 is the natural number following 219 and preceding 221.-In mathematics:It is a composite number, with its divisors being 1, 2, 4, 5, 10, 11, 20, 22, 44, 55 and 110, making it an amicable number with 284... |
231 | 242 242 (number) 242 is the natural number following 241 and preceding 243.-In mathematics:242 is the smallest integer to start a run of four consecutive integers with the same number of divisors.242 is a nontotient since there is no integer with 242 coprimes below it.... |
253 | 264 | 275 | 550 | 1100 | 11000 |
| Division Division (mathematics) right|thumb|200px|20 \div 4=5In mathematics, especially in elementary arithmetic, division is an arithmetic operation.Specifically, if c times b equals a, written:c \times b = a\,... |
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11 | 5.5 |  |
2.75 75 (number) 75 is the natural number following 74 and preceding 76.-In mathematics:As the sum of the first five pentagonal numbers, seventy-five is a pentagonal pyramidal number. It is also an enneagonal number.... |
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| Exponentiation Exponentiation Exponentiation is a mathematical operation, written as an, involving two numbers, the base a and the exponent n... |
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11 | 121 | 1331 | 14641 | 161051 | 1771561 | 19487171 | 214358881 | 2357947691 | 25937421601 | 285311670611 | 3138428376721 | 34522712143931 | |
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1 | 2048 | 177147 | 4194304 | 48828125 | 362797056 | 1977326743 | 8589934592 | 31381059609 | 100000000000 | 285311670611 | 743008370688 | 1792160394037 |
| Radix Radix In mathematical numeral systems, the base or radix for the simplest case is the number of unique digits, including zero, that a positional numeral system uses to represent numbers. For example, for the decimal system the radix is ten, because it uses the ten digits from 0 through 9.In any numeral... |
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List of basic operations that make 11
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In science
- The atomic numberAtomic numberIn chemistry and physics, the atomic number is the number of protons found in the nucleus of an atom and therefore identical to the charge number of the nucleus. It is conventionally represented by the symbol Z. The atomic number uniquely identifies a chemical element...
of sodiumSodiumSodium is a chemical element with the symbol Na and atomic number 11. It is a soft, silvery-white, highly reactive metal and is a member of the alkali metals; its only stable isotope is 23Na. It is an abundant element that exists in numerous minerals, most commonly as sodium chloride...
. - In chemistry, Group 11 includes the three coinage metals copperCopperCopper is a chemical element with the symbol Cu and atomic number 29. It is a ductile metal with very high thermal and electrical conductivity. Pure copper is soft and malleable; an exposed surface has a reddish-orange tarnish...
, silverSilverSilver is a metallic chemical element with the chemical symbol Ag and atomic number 47. A soft, white, lustrous transition metal, it has the highest electrical conductivity of any element and the highest thermal conductivity of any metal...
, and goldGoldGold is a chemical element with the symbol Au and an atomic number of 79. Gold is a dense, soft, shiny, malleable and ductile metal. Pure gold has a bright yellow color and luster traditionally considered attractive, which it maintains without oxidizing in air or water. Chemically, gold is a...
known from antiquity. It also includes the superheavy element roentgeniumRoentgeniumRoentgenium is a synthetic radioactive chemical element with the symbol Rg and atomic number 111. It is placed as the heaviest member of the group 11 elements, although a sufficiently stable isotope has not yet been produced in a sufficient amount that would confirm this position as a heavier...
, which was discovered only recently. - The number of spacetimeSpacetimeIn physics, spacetime is any mathematical model that combines space and time into a single continuum. Spacetime is usually interpreted with space as being three-dimensional and time playing the role of a fourth dimension that is of a different sort from the spatial dimensions...
dimensionDimensionIn physics and mathematics, the dimension of a space or object is informally defined as the minimum number of coordinates needed to specify any point within it. Thus a line has a dimension of one because only one coordinate is needed to specify a point on it...
s in M-theoryM-theoryIn theoretical physics, M-theory is an extension of string theory in which 11 dimensions are identified. Because the dimensionality exceeds that of superstring theories in 10 dimensions, proponents believe that the 11-dimensional theory unites all five string theories...
.
Astronomy
- Apollo 11Apollo 11In early 1969, Bill Anders accepted a job with the National Space Council effective in August 1969 and announced his retirement as an astronaut. At that point Ken Mattingly was moved from the support crew into parallel training with Anders as backup Command Module Pilot in case Apollo 11 was...
was the first manned spacecraft to land on the MoonMoonThe Moon is Earth's only known natural satellite,There are a number of near-Earth asteroids including 3753 Cruithne that are co-orbital with Earth: their orbits bring them close to Earth for periods of time but then alter in the long term . These are quasi-satellites and not true moons. For more...
.
- The approximate periodicity of a sunspot cycle is 11 years.
- Messier objectMessier objectThe Messier objects are a set of astronomical objects first listed by French astronomer Charles Messier in 1771. The original motivation of the catalogue was that Messier was a comet hunter, and was frustrated by objects which resembled but were not comets...
M11Wild Duck ClusterThe Wild Duck Cluster is an open cluster in the constellation Scutum. It was discovered by Gottfried Kirch in 1681. Charles Messier included it in his catalogue in 1764....
, a magnitude 7.0 open clusterOpen clusterAn open cluster is a group of up to a few thousand stars that were formed from the same giant molecular cloud and have roughly the same age. More than 1,100 open clusters have been discovered within the Milky Way Galaxy, and many more are thought to exist...
in the constellation ScutumScutumScutum is a small constellation introduced in the seventeenth century. Its name is Latin for shield.-History:Scutum is the only constellation that owes its name to a non-classical historical figure...
, also known as the Wild Duck ClusterWild Duck ClusterThe Wild Duck Cluster is an open cluster in the constellation Scutum. It was discovered by Gottfried Kirch in 1681. Charles Messier included it in his catalogue in 1764....
.
- The New General CatalogueNew General CatalogueThe New General Catalogue of Nebulae and Clusters of Stars is a well-known catalogue of deep sky objects in astronomy. It contains 7,840 objects, known as the NGC objects...
object NGC 11NGC 11NGC 11 is a spiral galaxy located in the Andromeda constellation. It is located at right ascension ; declination ; under J2000.0 coordinates....
, a spiral galaxySpiral galaxyA spiral galaxy is a certain kind of galaxy originally described by Edwin Hubble in his 1936 work The Realm of the Nebulae and, as such, forms part of the Hubble sequence. Spiral galaxies consist of a flat, rotating disk containing stars, gas and dust, and a central concentration of stars known as...
in the constellationConstellationIn modern astronomy, a constellation is an internationally defined area of the celestial sphere. These areas are grouped around asterisms, patterns formed by prominent stars within apparent proximity to one another on Earth's night sky....
AndromedaAndromeda (constellation)Andromeda is a constellation in the northern sky. It is named after Andromeda, the princess in the Greek legend of Perseus who was chained to a rock to be eaten by the sea monster Cetus...
- The Saros number of the solar eclipseSolar eclipseAs seen from the Earth, a solar eclipse occurs when the Moon passes between the Sun and the Earth, and the Moon fully or partially blocks the Sun as viewed from a location on Earth. This can happen only during a new moon, when the Sun and the Moon are in conjunction as seen from Earth. At least...
series which began on -2511 December 26 and ended on -1158 March 18. The duration of Saros series 11 was 1352.2 years, and it contained 76 solar eclipses.
- The Saros number of the lunar eclipseLunar eclipseA lunar eclipse occurs when the Moon passes behind the Earth so that the Earth blocks the Sun's rays from striking the Moon. This can occur only when the Sun, Earth, and Moon are aligned exactly, or very closely so, with the Earth in the middle. Hence, a lunar eclipse can only occur the night of a...
series which began on -2389 June 19 and ended on -1037 September 8. The duration of Saros series 11 was 1352.2 years, and it contained 76 lunar eclipses.
- The 11th moon of JupiterJupiterJupiter is the fifth planet from the Sun and the largest planet within the Solar System. It is a gas giant with mass one-thousandth that of the Sun but is two and a half times the mass of all the other planets in our Solar System combined. Jupiter is classified as a gas giant along with Saturn,...
is HimaliaHimalia (moon)Himalia is the largest irregular satellite of Jupiter, the sixth largest overall in size, and the fifth largest in mass. It was discovered by Charles Dillon Perrine at the Lick Observatory on 3 December 1904 and is named after the nymph Himalia, who bore three sons of Zeus .- Discovery...
.
In religion
After Judas IscariotJudas Iscariot
Judas Iscariot was, according to the New Testament, one of the twelve disciples of Jesus. He is best known for his betrayal of Jesus to the hands of the chief priests for 30 pieces of silver.-Etymology:...
was disgraced, the remaining apostles of Jesus
Jesus
Jesus of Nazareth , commonly referred to as Jesus Christ or simply as Jesus or Christ, is the central figure of Christianity...
were sometimes described as "the Eleven"; this occurred even after Matthias
Matthias
Matthias is a name derived from the Greek Ματθιας, in origin similar to Matthew.See also: -People with the given name Matthias:Notable people named Matthias include the following:In nobility:* Matthias Corvinus of Hungary, King of Hungary...
was added to bring the number to twelve, as in Acts 2:14.
Eleven is a spiritually significant number in Thelema
Thelema
Thelema is a religious philosophy that was established, defined and developed by the early 20th century British writer and ceremonial magician, Aleister Crowley. He believed himself to be the prophet of a new age, the Æon of Horus, based upon a religious experience that he had in Egypt in 1904...
.
In music
- The interval of an octaveOctaveIn music, an octave is the interval between one musical pitch and another with half or double its frequency. The octave relationship is a natural phenomenon that has been referred to as the "basic miracle of music", the use of which is "common in most musical systems"...
and a fourth is an eleventh. A complete eleventh chord has almost every note of a diatonic scaleDiatonic scaleIn music theory, a diatonic scale is a seven note, octave-repeating musical scale comprising five whole steps and two half steps for each octave, in which the two half steps are separated from each other by either two or three whole steps...
. - The number of thumb keys on a bassoonBassoonThe bassoon is a woodwind instrument in the double reed family that typically plays music written in the bass and tenor registers, and occasionally higher. Appearing in its modern form in the 19th century, the bassoon figures prominently in orchestral, concert band and chamber music literature...
, not counting the whisper key. (A few bassoons have a twelfth thumb key.) - In the mockumentary This Is Spinal TapThis Is Spinal TapThis Is Spinal Tap is an American 1984 rock musical mockumentary directed by Rob Reiner about the fictional heavy metal band Spinal Tap...
, Spinal TapSpinal Tap (band)Spinal Tap is a parody heavy metal band that first appeared on a failed 1979 ABC TV sketch comedy pilot called "The T.V. Show", starring Rob Reiner...
's amplifiers go up to elevenUp to eleven"Up to eleven" or "these go to eleven" is an idiom from popular culture which has come to refer to anything being exploited to its utmost abilities, or apparently exceeding them, such as a sound volume control. Similarly, the expression "turning it up to eleven" refers to the act of taking...
. - In Igor Stravinsky's The Rite of SpringThe Rite of SpringThe Rite of Spring, original French title Le sacre du printemps , is a ballet with music by Igor Stravinsky; choreography by Vaslav Nijinsky; and concept, set design and costumes by Nicholas Roerich...
, there are eleven consecutive repetitions of the same chord. - In Tool'sTool (band)Tool is an American rock band from Los Angeles, California. Formed in 1990, the group's line-up has included drummer Danny Carey, guitarist Adam Jones, and vocalist Maynard James Keenan. Since 1995, Justin Chancellor has been the band's bassist, replacing their original bassist Paul D'Amour...
song Jimmy, and in Negativland'sNegativlandNegativland is an experimental music and sound collage band which originated in the San Francisco Bay Area in the late 1970s. They took their name from a Neu! song, while their record label is named after another Neu! song...
song Time Zones the number eleven is heard numerous times in the lyrics. - "Eleven pipers piping" is the gift on the eleventh day of Christmas in the carol "The Twelve Days of ChristmasThe Twelve Days of Christmas (song)"The Twelve Days of Christmas" is an English Christmas carol that enumerates a series of increasingly grand gifts given on each of the twelve days of Christmas. Although first published in England in 1780, textual evidence may indicate the song is French in origin...
" - The Eleven is a song by The Grateful Dead.
In sports
- There are eleven players on a soccerFootball (soccer)Association football, more commonly known as football or soccer, is a sport played between two teams of eleven players with a spherical ball...
team on the field at a time as well as in a cricketCricketCricket is a bat-and-ball game played between two teams of 11 players on an oval-shaped field, at the centre of which is a rectangular 22-yard long pitch. One team bats, trying to score as many runs as possible while the other team bowls and fields, trying to dismiss the batsmen and thus limit the...
team. Within a school or college, the phrase first elevenFirst elevenFirst eleven or first XI may refer to the eleven players in an organisation's leading team, particularly a cricket team or association football team....
(or first XI) - often "first football XI" and "first cricket XI" - generally refers to the first (best) team currently playing. Other teams are often referred to as "the second XI" etc.
- Also in soccerFootball (soccer)Association football, more commonly known as football or soccer, is a sport played between two teams of eleven players with a spherical ball...
, in the German language (and others like Italian - "gli undici metri" -, countries that predominantly use the metric system) a penalty kickPenalty kickA penalty kick is a type of direct free kick in association football, taken from twelve yards out from goal and with only the goalkeeper of the defending team between the penalty taker and the goal.Penalty kicks are performed during normal play...
is referred to as "Elfmeter" because the penalty spot is approximately 11m (precisely 12 yards) from the goal line. Historically, in the Pyramid formation that position names are taken from, a left wing-forward in football wears number 11. In the modern game, especially using the 4-4-2 formation, it is worn by a left-sided midfielderMidfielderA midfielder is an association football position. Some midfielders play a more defensive role, while others blur the boundaries between midfielders and forwards. The number of midfielders a team uses during a match may vary, depending on the team's formation and each individual player's role...
. Less commonly a strikerStrikerForwards, also known as strikers, are the players on a team in association football who play nearest to the opposing team's goal, and are therefore principally responsible for scoring goals...
will wear the shirt.
- There are eleven players in a field hockeyField hockeyField Hockey, or Hockey, is a team sport in which a team of players attempts to score goals by hitting, pushing or flicking a ball into an opposing team's goal using sticks...
team. The player wearing 11 will usually play on the left-hand side, as in soccer.
- An American footballAmerican footballAmerican football is a sport played between two teams of eleven with the objective of scoring points by advancing the ball into the opposing team's end zone. Known in the United States simply as football, it may also be referred to informally as gridiron football. The ball can be advanced by...
team also has eleven players on the field at one time during play. 11 is also worn by quarterbackQuarterbackQuarterback is a position in American and Canadian football. Quarterbacks are members of the offensive team and line up directly behind the offensive line...
s, kickersPlacekickerPlacekicker, or simply kicker , is the title of the player in American and Canadian football who is responsible for the kicking duties of field goals, extra points...
, punterPunter (football position)A punter in American or Canadian football is a special teams player who receives the snapped ball directly from the line of scrimmage and then punts the football to the opposing team so as to limit any field position advantage. This generally happens on a fourth down in American football and a...
and wide receiverWide receiverA wide receiver is an offensive position in American and Canadian football, and is the key player in most of the passing plays. Only players in the backfield or the ends on the line are eligible to catch a forward pass. The two players who begin play at the ends of the offensive line are eligible...
s in American footballAmerican footballAmerican football is a sport played between two teams of eleven with the objective of scoring points by advancing the ball into the opposing team's end zone. Known in the United States simply as football, it may also be referred to informally as gridiron football. The ball can be advanced by...
's NFLNational Football LeagueThe National Football League is the highest level of professional American football in the United States, and is considered the top professional American football league in the world. It was formed by eleven teams in 1920 as the American Professional Football Association, with the league changing...
.
- In most rugby leagueRugby leagueRugby league football, usually called rugby league, is a full contact sport played by two teams of thirteen players on a rectangular grass field. One of the two codes of rugby football, it originated in England in 1895 by a split from Rugby Football Union over paying players...
competitions (but not the European Super LeagueSuper LeagueSuper League is the top-level professional rugby league football club competition in Europe. As a result of sponsorship from engage Mutual Assurance the competition is currently officially known as the engage Super League. The League features fourteen teams: thirteen from England and one from...
, which uses static squad numbering), one of the starting second-row forwards wears the number 11.
- In rugby unionRugby unionRugby union, often simply referred to as rugby, is a full contact team sport which originated in England in the early 19th century. One of the two codes of rugby football, it is based on running with the ball in hand...
, the starting left wing wears the 11 shirt.
- In cricket, the eleventh batsman is usually the weakest batsman, at the end of the tail. He is primarily in the team for his bowling abilities.
- The jersey numberSquad numberIn team sports, the squad number, shirt number, jersey number, sweater number, uniform number or simply a number is the number worn on a player's uniform, to identify and distinguish each player from others wearing the same or similar uniforms...
11 has been retired by several North American sports teams in honor of past playing greats or other key figures:- In Major League BaseballMajor League BaseballMajor League Baseball is the highest level of professional baseball in the United States and Canada, consisting of teams that play in the National League and the American League...
:- The Chicago White SoxChicago White SoxThe Chicago White Sox are a Major League Baseball team located in Chicago, Illinois.The White Sox play in the American League's Central Division. Since , the White Sox have played in U.S. Cellular Field, which was originally called New Comiskey Park and nicknamed The Cell by local fans...
, for Hall of FamerNational Baseball Hall of Fame and MuseumThe National Baseball Hall of Fame and Museum is an American history museum and hall of fame, located at 25 Main Street in Cooperstown, New York, operated by private interests serving as the central point for the study of the history of baseball in the United States and beyond, the display of...
Luis AparicioLuis AparicioLuis Ernesto Aparicio Montiel is a former shortstop in professional baseball. His career in Major League Baseball spanned three decades, from through . Aparicio played for the Chicago White Sox , Baltimore Orioles and Boston Red Sox . He batted and threw right-handed...
. Current White Sox shortstop Omar VizquelOmar VizquelOmar Enrique Vizquel González , nicknamed "Little O", is a Venezuelan Major League Baseball shortstop and third baseman. Vizquel has played for the Seattle Mariners , the Cleveland Indians , the San Francisco Giants , the Texas Rangers and the Chicago White Sox...
, like Aparicio a Venezuelan, wears the number with Aparicio's blessing. - The Detroit TigersDetroit TigersThe Detroit Tigers are a Major League Baseball team located in Detroit, Michigan. One of the American League's eight charter franchises, the club was founded in Detroit in as part of the Western League. The Tigers have won four World Series championships and have won the American League pennant...
, for Hall of Fame managerManager (baseball)In baseball, the field manager is an individual who is responsible for matters of team strategy on the field and team leadership. Managers are typically assisted by between one and six assistant coaches, whose responsibilities are specialized...
Sparky AndersonSparky AndersonGeorge Lee "Sparky" Anderson was an American Major League Baseball manager. He managed the National League's Cincinnati Reds to the 1975 and 1976 championships, then added a third title in 1984 with the Detroit Tigers of the American League. He was the first manager to win the World Series in both...
. - The Los Angeles Angels of AnaheimLos Angeles Angels of AnaheimThe Los Angeles Angels of Anaheim are a professional baseball team based in Anaheim, California, United States. The Angels are a member of the Western Division of Major League Baseball's American League. The "Angels" name originates from the city in which the team started, Los Angeles...
, for Jim FregosiJim FregosiJames Louis Fregosi is a former Major League Baseball shortstop and manager. During an 18-year baseball career, he played from 1961–1978 for four different teams, primarily the Los Angeles and California Angels. In that franchise's first eleven years of play, he became its first star as the team's...
, who played for the team in its former incarnations as the Los Angeles Angels and California Angels, and also managed the California Angels. - The Pittsburgh PiratesPittsburgh PiratesThe Pittsburgh Pirates are a Major League Baseball club based in Pittsburgh, Pennsylvania. They play in the Central Division of the National League, and are five-time World Series Champions...
, for Hall of Famer Paul WanerPaul WanerPaul Glee Waner , nicknamed "Big Poison", was a German-American Major League Baseball right fielder.-Pittsburgh Pirates:...
. - The San Francisco GiantsSan Francisco GiantsThe San Francisco Giants are a Major League Baseball team based in San Francisco, California, playing in the National League West Division....
, for Hall of Famer Carl HubbellCarl HubbellCarl Owen Hubbell was an American baseball player. He was a member of the New York Giants in the National League from 1928 to 1943, and remained on the Giants' payroll for the rest of his life, long after their move to San Francisco.Twice voted the National League's Most Valuable Player, Hubbell...
, honoring the number's retirement when the team was known as the New York GiantsHistory of the New York Giants (NL)The history of the New York Giants, before the franchise moved to San Francisco, lasted from 1883 to 1957. It featured five of the franchise's six World Series wins and 17 of its 21 National League pennants...
. - The Seattle MarinersSeattle MarinersThe Seattle Mariners are a professional baseball team based in Seattle, Washington. Enfranchised in , the Mariners are a member of the Western Division of Major League Baseball's American League. Safeco Field has been the Mariners' home ballpark since July...
have yet to retire any numbers, but have not issued #11 since the retirement of Edgar MartínezEdgar MartinezEdgar Martínez , nicknamed "Gar" and "Papi", is a former Major League Baseball third baseman and designated hitter. He spent his entire 18-year Major League career with the Seattle Mariners. He is the cousin of Carmelo Martínez.-Seattle Mariners:On December 19, 1982, the Seattle Mariners signed...
at the end of the 2004 season.
- The Chicago White Sox
- In the NBANational Basketball AssociationThe National Basketball Association is the pre-eminent men's professional basketball league in North America. It consists of thirty franchised member clubs, of which twenty-nine are located in the United States and one in Canada...
:- The Detroit PistonsDetroit PistonsThe Detroit Pistons are a franchise of the National Basketball Association based in Auburn Hills, Michigan. The team's home arena is The Palace of Auburn Hills. It was originally founded in Fort Wayne, Indiana as the Fort Wayne Pistons as a member of the National Basketball League in 1941, where...
, for Hall of Famer Isiah ThomasIsiah ThomasIsiah Lord Thomas III , nicknamed "Zeke",is the men's basketball coach for the FIU Golden Panthers, and a retired American professional basketball player who played point guard for the Detroit Pistons of the National Basketball Association from 1981 until 1994. He led the "Bad Boys" to the NBA...
. - The Sacramento KingsSacramento KingsThe Sacramento Kings are a professional basketball team based in Sacramento, California, United States. They are currently members of the Western Conference of the National Basketball Association...
, for Hall of Famer Bob Davies, honoring the number's retirement when the team was known as the Rochester Royals. - The Washington WizardsWashington WizardsThe Washington Wizards are a professional basketball team based in Washington, D.C., previously known as Washington Bullets. They play in the National Basketball Association .-Early years:...
, for Hall of Famer Elvin HayesElvin HayesElvin Ernest Hayes is a retired American basketball player and radio analyst for Houston Cougars men's basketball, where he played college basketball...
, who played for the team in its past incarnations as the Baltimore, Capital, and Washington Bullets.
- The Detroit Pistons
- In the NFLNational Football LeagueThe National Football League is the highest level of professional American football in the United States, and is considered the top professional American football league in the world. It was formed by eleven teams in 1920 as the American Professional Football Association, with the league changing...
:- The New York GiantsNew York GiantsThe New York Giants are a professional American football team based in East Rutherford, New Jersey, representing the New York City metropolitan area. The Giants are currently members of the Eastern Division of the National Football Conference in the National Football League...
, for Phil SimmsPhil SimmsPhillip Martin "Phil" Simms is a former American football quarterback, and currently a television sportscaster for the CBS network. After a standout career at Morehead State University, Simms was drafted in the first round by the New York Giants of the National Football League with the number...
.
- The New York Giants
- In the NHLNational Hockey LeagueThe National Hockey League is an unincorporated not-for-profit association which operates a major professional ice hockey league of 30 franchised member clubs, of which 7 are currently located in Canada and 23 in the United States...
:- The Buffalo SabresBuffalo SabresThe Buffalo Sabres are a professional ice hockey team based in Buffalo, New York. They are members of the Northeast Division of the Eastern Conference of the National Hockey League .-Founding and early success: 1970-71—1980-81:...
, for Hall of FamerHockey Hall of FameThe Hockey Hall of Fame is located in Toronto, Ontario, Canada. Dedicated to the history of ice hockey, it is both a museum and a hall of fame. It holds exhibits about players, teams, National Hockey League records, memorabilia and NHL trophies, including the Stanley Cup...
Gilbert PerreaultGilbert PerreaultGilbert Perreault is a retired Canadian professional ice hockey centre who played for seventeen seasons with the Buffalo Sabres of the National Hockey League. He was inducted to the Hockey Hall of Fame in 1990. Known for his ability to stickhandle in close quarters, he was regarded as one of the...
. - The Edmonton OilersEdmonton OilersThe Edmonton Oilers are a professional ice hockey team based in Edmonton, Alberta, Canada. They are members of the Northwest Division in the Western Conference of the National Hockey League ....
and New York RangersNew York RangersThe New York Rangers are a professional ice hockey team based in the borough of Manhattan in New York, New York, USA. They are members of the Atlantic Division of the Eastern Conference of the National Hockey League . Playing their home games at Madison Square Garden, the Rangers are one of the...
, for Hall of Famer Mark MessierMark MessierMark Douglas Messier is a former Canadian professional ice hockey centre of the National Hockey League and current special assistant to the president and general manager of the New York Rangers. He spent a quarter of a century in the NHL with the Edmonton Oilers, New York Rangers, and Vancouver...
. - The St. Louis BluesSt. Louis BluesThe St. Louis Blues are a professional ice hockey team based in St. Louis, Missouri. They are members of the Central Division of the Western Conference of the National Hockey League . The team is named after the famous W. C. Handy song "St. Louis Blues", and plays in the 19,150-seat Scottrade...
, for Brian SutterBrian SutterBrian Louis Allen Sutter is a retired Canadian ice hockey forward and former head coach in the National Hockey League . Brian is the second oldest of the famous Sutter brothers, six of whom have played in the NHL, and is the only one to have his number retired by an NHL team.-Player: Sutter was...
. - The Washington CapitalsWashington CapitalsThe Washington Capitals are a professional ice hockey team based in Washington, D.C. They are members of the Southeast Division of the Eastern Conference of the National Hockey League . Since their founding in 1974, "The Caps" have won one conference championship to reach the 1998 Stanley Cup...
, for Hall of Famer Mike GartnerMike GartnerMichael Alfred Gartner is a retired Canadian professional ice hockey right winger who played 19 seasons in the National Hockey League for the Washington Capitals, Minnesota North Stars, New York Rangers, Toronto Maple Leafs and Phoenix Coyotes...
.
- The Buffalo Sabres
- In Major League Baseball
In the military
- The number of guns in a gun saluteSaluteA salute is a gesture or other action used to display respect. Salutes are primarily associated with armed forces, but other organizations and civil people also use salutes.-Military salutes:...
to U.S. ArmyUnited States ArmyThe United States Army is the main branch of the United States Armed Forces responsible for land-based military operations. It is the largest and oldest established branch of the U.S. military, and is one of seven U.S. uniformed services...
, Air ForceUnited States Air ForceThe United States Air Force is the aerial warfare service branch of the United States Armed Forces and one of the American uniformed services. Initially part of the United States Army, the USAF was formed as a separate branch of the military on September 18, 1947 under the National Security Act of...
and Marine Corps Brigadier Generals, and to NavyUnited States NavyThe United States Navy is the naval warfare service branch of the United States Armed Forces and one of the seven uniformed services of the United States. The U.S. Navy is the largest in the world; its battle fleet tonnage is greater than that of the next 13 largest navies combined. The U.S...
and Coast GuardUnited States Coast GuardThe United States Coast Guard is a branch of the United States Armed Forces and one of the seven U.S. uniformed services. The Coast Guard is a maritime, military, multi-mission service unique among the military branches for having a maritime law enforcement mission and a federal regulatory agency...
Rear Admirals Lower Half. - The Military Occupational SpecialtyMilitary Occupational SpecialtyA United States military occupation code, or a Military Occupational Specialty code , is a nine character code used in the United States Army and United States Marines to identify a specific job. In the U.S. Air Force, a system of Air Force Specialty Codes is used...
(MOS) designator given to US Army Infantry Officer as well as to enlisted personnel (AKA 11 MOS Series, or 11B, 11C, 11D, 11H, 11M, etc.) - The number of General Orders for Sentries in the Marine CorpsUnited States Marine CorpsThe United States Marine Corps is a branch of the United States Armed Forces responsible for providing power projection from the sea, using the mobility of the United States Navy to deliver combined-arms task forces rapidly. It is one of seven uniformed services of the United States...
and United States NavyUnited States NavyThe United States Navy is the naval warfare service branch of the United States Armed Forces and one of the seven uniformed services of the United States. The U.S. Navy is the largest in the world; its battle fleet tonnage is greater than that of the next 13 largest navies combined. The U.S...
. - A page in the Service Record Book of an enlisted Marine for writing down disciplinary actions.
- World War IWorld War IWorld War I , which was predominantly called the World War or the Great War from its occurrence until 1939, and the First World War or World War I thereafter, was a major war centred in Europe that began on 28 July 1914 and lasted until 11 November 1918...
ended with an ArmisticeArmistice with Germany (Compiègne)The armistice between the Allies and Germany was an agreement that ended the fighting in the First World War. It was signed in a railway carriage in Compiègne Forest on 11 November 1918 and marked a victory for the Allies and a complete defeat for Germany, although not technically a surrender...
on November 11, 1918, which went into effect at 11:00 am-the 11th hour on the 11th day of the 11th month of the year. Armistice DayArmistice DayArmistice Day is on 11 November and commemorates the armistice signed between the Allies of World War I and Germany at Compiègne, France, for the cessation of hostilities on the Western Front of World War I, which took effect at eleven o'clock in the morning—the "eleventh hour of the eleventh day...
is still observed on November 11 of each year, although it is now called Veterans DayVeterans DayVeterans Day, formerly Armistice Day, is an annual United States holiday honoring military veterans. It is a federal holiday that is observed on November 11. It coincides with other holidays such as Armistice Day or Remembrance Day, which are celebrated in other parts of the world and also mark...
in the United States and Remembrance DayRemembrance DayRemembrance Day is a memorial day observed in Commonwealth countries since the end of World War I to remember the members of their armed forces who have died in the line of duty. This day, or alternative dates, are also recognized as special days for war remembrances in many non-Commonwealth...
in the Commonwealth of NationsCommonwealth of NationsThe Commonwealth of Nations, normally referred to as the Commonwealth and formerly known as the British Commonwealth, is an intergovernmental organisation of fifty-four independent member states...
and parts of Europe.
In computing
- In Mozilla FirefoxMozilla FirefoxMozilla Firefox is a free and open source web browser descended from the Mozilla Application Suite and managed by Mozilla Corporation. , Firefox is the second most widely used browser, with approximately 25% of worldwide usage share of web browsers...
, OperaOpera (web browser)Opera is a web browser and Internet suite developed by Opera Software with over 200 million users worldwide. The browser handles common Internet-related tasks such as displaying web sites, sending and receiving e-mail messages, managing contacts, chatting on IRC, downloading files via BitTorrent,...
, KonquerorKonquerorNot to be confused with the Conqueror web browser.Konqueror is a web browser and file manager that provides file-viewer functionality for file systems such as local files, files on a remote ftp server and files in a disk image. It is a core part of the KDE desktop environment...
for KDEKDEKDE is an international free software community producing an integrated set of cross-platform applications designed to run on Linux, FreeBSD, Microsoft Windows, Solaris and Mac OS X systems...
, Google ChromeGoogle ChromeGoogle Chrome is a web browser developed by Google that uses the WebKit layout engine. It was first released as a beta version for Microsoft Windows on September 2, 2008, and the public stable release was on December 11, 2008. The name is derived from the graphical user interface frame, or...
and Internet ExplorerInternet ExplorerWindows Internet Explorer is a series of graphical web browsers developed by Microsoft and included as part of the Microsoft Windows line of operating systems, starting in 1995. It was first released as part of the add-on package Plus! for Windows 95 that year...
for Windows, the function keyFunction keyA function key is a key on a computer or terminal keyboard which can be programmed so as to cause an operating system command interpreter or application program to perform certain actions...
F11 key toggles full screen viewing mode. In Mac OS XMac OS XMac OS X is a series of Unix-based operating systems and graphical user interfaces developed, marketed, and sold by Apple Inc. Since 2002, has been included with all new Macintosh computer systems...
, F11 hides all open windows. - The windowing system for UnixUnixUnix is a multitasking, multi-user computer operating system originally developed in 1969 by a group of AT&T employees at Bell Labs, including Ken Thompson, Dennis Ritchie, Brian Kernighan, Douglas McIlroy, and Joe Ossanna...
computers is known as X11. - Computers of the PDP-11PDP-11The PDP-11 was a series of 16-bit minicomputers sold by Digital Equipment Corporation from 1970 into the 1990s, one of a succession of products in the PDP series. The PDP-11 replaced the PDP-8 in many real-time applications, although both product lines lived in parallel for more than 10 years...
series from Digital Equipment CorporationDigital Equipment CorporationDigital Equipment Corporation was a major American company in the computer industry and a leading vendor of computer systems, software and peripherals from the 1960s to the 1990s...
were informally referred to as "elevens".
Canada
- The stylized maple leaf on the Flag of CanadaFlag of CanadaThe national flag of Canada, also known as the Maple Leaf, and , is a red flag with a white square in its centre, featuring a stylized 11-pointed red maple leaf. Its adoption in 1965 marked the first time a national flag had been officially adopted in Canada to replace the Union Flag...
has eleven points. - The Canadian one-dollar coinLoonieThe Canadian 1 dollar coin is a gold-coloured, bronze-plated, one-dollar coin introduced in 1987. It bears images of a common loon, a bird which is common and well known in Canada, on the reverse, and of Queen Elizabeth II on the obverse.The design for the coin was meant to be a voyageur theme,...
is a hendecagonHendecagonIn geometry, a hendecagon is an 11-sided polygon....
, an eleven-sided polygon. - Clocks depicted on Canadian currency, for example the Canadian fifty-dollar billCanadian fifty-dollar billThe Canadian $50 bill is a banknote of the Canadian dollar. It is sometimes dispensed by ATMs, but not as commonly as the $20 bill.The current 50-dollar bill is predominantly red in colour. The front features a portrait of William Lyon Mackenzie King, the coat of arms, and a picture of the Peace...
, show 11:00. - Eleven denominations of Canadian currency are produced in large quantities.
- Due to Canada's federal natureMonarchy in the Canadian provincesThe monarchy of Canada forms the core of each Canadian provincial jurisdiction's Westminster-style parliamentary democracy, being the foundation of the executive, legislative, and judicial branches of government in each province...
, eleven legally distinct Crowns effectively exist in the country, with the Monarch being represented separately in each province, as well as at the federal level.
In other fields
- The number of incarnations of The Doctor in BBC sci-fi series Doctor Who is eleven.
- Three films -- Ben-HurBen-Hur (1959 film)Ben-Hur is a 1959 American epic film directed by William Wyler and starring Charlton Heston in the title role, the third film adaptation of Lew Wallace's 1880 novel Ben-Hur: A Tale of the Christ. The screenplay was written by Karl Tunberg, Gore Vidal, and Christopher Fry. The score was composed by...
(19591959 in filmThe year 1959 in film involved some significant events, with Ben-Hur winning a record 11 Academy Awards.-Events:* The Three Stooges make their 190th and last short film, Sappy Bull Fighters....
), TitanicTitanic (1997 film)Titanic is a 1997 American epic romance and disaster film directed, written, co-produced, and co-edited by James Cameron. A fictionalized account of the sinking of the RMS Titanic, it stars Leonardo DiCaprio as Jack Dawson, Kate Winslet as Rose DeWitt Bukater and Billy Zane as Rose's fiancé, Cal...
(19971997 in film-Events:* The original Star Wars trilogy's Special Editions are released.* Production begins on Star Wars Episode I: The Phantom Menace.* Titanic becomes the first film to gross US$1,000,000,000 at the box office making it the highest grossing film in history until Avatar broke the record in 2010.*...
), and The Lord of the Rings: The Return of the KingThe Lord of the Rings: The Return of the KingThe Lord of the Rings: The Return of the King is a 2003 epic fantasy-drama film directed by Peter Jackson that is based on the second and third volumes of J. R. R. Tolkien's The Lord of the Rings...
(20032003 in filmThe year 2003 in film involved some significant events. Releases of sequels took place with movies like The Lord of the Rings: The Return of the King, 2 Fast 2 Furious, Charlie's Angels: Full Throttle, The Matrix Reloaded, The Matrix Revolutions, Pokémon Heroes, Terminator 3: Rise of the Machines,...
) -- have each won eleven Academy AwardsAcademy AwardsAn Academy Award, also known as an Oscar, is an accolade bestowed by the American Academy of Motion Picture Arts and Sciences to recognize excellence of professionals in the film industry, including directors, actors, and writers...
, including Best Picture of their respective years. - The number eleven is important in numerologyNumerologyNumerology is any study of the purported mystical relationship between a count or measurement and life. It has many systems and traditions and beliefs...
, as it is the first of the Master Numbers. - Being only one hour before 12:00—midnightMidnightMidnight is the transition time period from one day to the next: the moment when the date changes. In the Roman time system, midnight was halfway between sunset and sunrise, varying according to the seasons....
—the eleventh hour means the last possible moment to take care of something, and often implies a situation of urgent danger or emergency (see Doomsday clockDoomsday ClockThe Doomsday Clock is a symbolic clock face, maintained since 1947 by the board of directors of the Bulletin of the Atomic Scientists at the University of Chicago. The closer the clock is to midnight, the closer the world is estimated to be to global disaster. , the Doomsday Clock now stands at six...
). - In AstrologyAstrologyAstrology consists of a number of belief systems which hold that there is a relationship between astronomical phenomena and events in the human world...
, Aquarius is the 11th astrological signAstrological signAstrological signs represent twelve equal segments or divisions of the zodiac. According to astrology, celestial phenomena reflect or govern human activity on the principle of "as above, so below", so that the twelve signs are held to represent twelve basic personality types or characteristic modes...
of the ZodiacZodiacIn astronomy, the zodiac is a circle of twelve 30° divisions of celestial longitude which are centred upon the ecliptic: the apparent path of the Sun across the celestial sphere over the course of the year...
. - Ocean's ElevenOcean's ElevenOcean's Eleven may refer to:*Ocean's 11 , the original heist film starring all five members of the Rat Pack*Ocean's Eleven , a remake of the above film with George Clooney, Brad Pitt, and Matt Damon...
is the name of two American films. - In BasqueBasque languageBasque is the ancestral language of the Basque people, who inhabit the Basque Country, a region spanning an area in northeastern Spain and southwestern France. It is spoken by 25.7% of Basques in all territories...
, hamaika ("eleven") has the double meaning of "infinite", probably from amaigabe, "endless", as in Hamaika aldiz etortzeko esan dizut! ("I told you infinite/eleven times to come!"). - American Airlines flight 11American Airlines Flight 11American Airlines Flight 11 was American Airlines' daily scheduled morning transcontinental flight from Logan International Airport, in Boston, Massachusetts, to Los Angeles International Airport, in Los Angeles, California...
, a BostonBostonBoston is the capital of and largest city in Massachusetts, and is one of the oldest cities in the United States. The largest city in New England, Boston is regarded as the unofficial "Capital of New England" for its economic and cultural impact on the entire New England region. The city proper had...
-Los AngelesLos ÁngelesLos Ángeles is the capital of the province of Biobío, in the commune of the same name, in Region VIII , in the center-south of Chile. It is located between the Laja and Biobío rivers. The population is 123,445 inhabitants...
flight which crashed into the North Tower of the World Trade Center after being hijacked by terrorists in New York CityNew York CityNew York is the most populous city in the United States and the center of the New York Metropolitan Area, one of the most populous metropolitan areas in the world. New York exerts a significant impact upon global commerce, finance, media, art, fashion, research, technology, education, and...
, New YorkNew YorkNew York is a state in the Northeastern region of the United States. It is the nation's third most populous state. New York is bordered by New Jersey and Pennsylvania to the south, and by Connecticut, Massachusetts and Vermont to the east...
on September 11, 2001. - The number 11 busLondon Buses route 11London Buses route 11 is a Transport for London contracted bus route in London, England, United Kingdom. The service is currently contracted to Go-Ahead London.-History:...
is a low-cost way of sightseeing in LondonLondonLondon is the capital city of :England and the :United Kingdom, the largest metropolitan area in the United Kingdom, and the largest urban zone in the European Union by most measures. Located on the River Thames, London has been a major settlement for two millennia, its history going back to its... - In the game of blackjackBlackjackBlackjack, also known as Twenty-one or Vingt-et-un , is the most widely played casino banking game in the world...
, an Ace can be counted as either one or eleven, whichever is more advantageous for the player. - 11 is the number of the French department AudeAudeAude is a department in south-central France named after the river Aude. The local council also calls the department "Cathar Country".Aude is also a frequent feminine French given name in Francophone countries, deriving initially from Aude or Oda, a wife of Bertrand, Duke of Aquitaine, and mother...
. - In the anime series Code Geass, Japan is known as Area 11 of the Brittanian Empire.